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Q. No.What is the angular spread between central maxima and first ordered minima of diffraction pattern due to single slit of width \(0.20\) mm, when light of wavelength \(500\) nm is incident on it normally?
1. \(2\times 10^{-3}\) rad
2. \(2.5\times 10^{-3} \) rad
3. \(3\times 10^{-3}\) rad
4. \(4\times 10^{-3}\) rad
Subtopic: Diffraction |
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In a Young's Double Slit Experiment (YDSE) using white light, the fringe immediately adjacent to the central white fringe on either side appears red. Which colour is observed at the farthest visible fringe from the centre?
1. Red
2. Blue
3. Green
4. Yellow
1. Red
2. Blue
3. Green
4. Yellow
Subtopic: Young's Double Slit Experiment |
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In Young's double slit experiment, the \(7^\text{th}\) maximum with wavelength \({\mathit{\lambda}}_{1}\) is at a distance \(d_1\) from the center of the screen, and that with wavelength \({\mathit{\lambda}}_{2}\) is at a distance \(d_2\) from the center of the screen. Then (\(d_1/d_2\)) is:
| 1. | \(\left({{\mathit{\lambda}}_{1}/{\mathit{\lambda}}_{2}}\right)\) | 2. | \(\left({{\mathit{\lambda}}_{2}/{\mathit{\lambda}}_{1}}\right)\) |
| 3. | \(\left({{\mathit{\lambda}}_{1}^{2}/{\mathit{\lambda}}_{2}^{2}}\right)\) | 4. | \(\left({{\mathit{\lambda}}_{2}^{2}/{\mathit{\lambda}}_{1}^{2}}\right)\) |
Subtopic: Young's Double Slit Experiment |
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The first diffraction minimum due to single slit diffraction is at \(\theta ~{=}~30^{\circ}\) for a light of wavelength \(5000~\mathring{A}.\) The width of the slit is:
| 1. | \({5}\times{10}^{{-}{5}}~\text{cm}\) | 2. | \({1}{.}{0}\times{10}^{{-}{4}}~\text{cm}\) |
| 3. | \({2}{.}{5}\times{10}^{{-}{5}}~\text{cm}\) | 4. | \({1}{.}{25}\times{10}^{{-}{5}}~\text{cm}\) |
Subtopic: Diffraction |
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Two coherent monochromatic light beams of intensities \(9I\) and \(4I\) are superposed. The maximum possible intensity in the resulting beam is:
| 1. | \(I\) | 2. | \(3I\) |
| 3. | \(16I\) | 4. | \(25I\) |
Subtopic: Interference vs Diffraction |
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A Young's double-slit setup is first performed in air and then in a liquid of refractive index \(\mu.\) At a particular location on the screen, the \(10{\text{th}}\) bright fringe in air and the \(12\text{th}\) bright fringe in liquid coincide. Then \(\mu=\)
1. \(1.8\)
2. \(1.54\)
3. \(1.67\)
4. \(1.2\)
1. \(1.8\)
2. \(1.54\)
3. \(1.67\)
4. \(1.2\)
Subtopic: Young's Double Slit Experiment |
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Polaroid glass is used in sun glasses because:
| 1. | it reduces the light intensity to half on account of polarisation |
| 2. | it is fashionable |
| 3. | it has good colour |
| 4. | it is cheaper |
Subtopic: Polarization of Light |
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In Young's double-slit experiment conducted with the light of an unknown wavelength, it is found that the fringe width is twice the separation between the slits, \(d,\) which is \(0.5~\text{mm}.\) The slit to screen distance is \(1~\text{m}.\) The wavelength of light used is:
| 1. | \(125~\text{nm}\) | 2. | \(250~\text{nm}\) |
| 3. | \(500~\text{nm}\) | 4. | \(1000~\text{nm}\) |
Subtopic: Young's Double Slit Experiment |
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In Young's double-slit experiment, a student observes \(8\) fringes in a certain segment of the screen when a monochromatic light of \(600\) nm wavelength is used. If the wavelength of light is changed to \(400\) nm, then the number of fringes he would observe in the same region of the screen is:
1. \(12\)
2. \(6\)
3. \(8\)
4. \(9\)
1. \(12\)
2. \(6\)
3. \(8\)
4. \(9\)
Subtopic: Young's Double Slit Experiment |
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NEET - 2022
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Given below are two statements:
| Assertion (A): | Radio waves can be polarised. |
| Reason (R): | Sound waves in the air are longitudinal in nature. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Polarization of Light |
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